Groove cutting machine



GROOVE CUTTING MACHINE Filed June 16, 1942 INVENTOR, Qusfaw 7?. lfeZm.

whamm ATTORNEY.

Patented Oct. 26, 1943 UNITED STATES Pi -WENTv OFFICE enoovn CUTTINGMACHINE Gustav R. Kelm, Paterson, N. J. I Application June16, 1942,Serial No. 447,237

3 Claims. (01. 90-16) A well-known type of milling machin includes,projecting from the frame proper of the machine and over the usualrotary work-supporting turret mounted on the upper one of two beds ortables horizontally adjustable independently but in feetilinear pathscrossing each other at right angles, an arm having a depending shank inwhich is supported some rotary cutter rotated by a horizontal spindleparalleling and below the arm and suitably driven by means within theframe.

The further object is so to construct the said machine thatgroove-cutting may be effected in work whose surface to be grooved isarranged either horizontally and facing said arm or at any selectedangular relation to the horizontal.

In the drawing,

Fig. 1 is a side elevation of so much of the improved milling machine asis here material;

Fig. 2 is an elevation of what is shown in Fig. 1, as seen from theleft; and

Figs. 3, 4, 5 and 6 show parts thereof.

I is the mentioned arm projecting horizontally I from the frame proper 2and forming therewith the frame of the machine. Under th arm will be theusual work-supporting means, not shown, including a turret rotative in ahorizontal plane and having means by which to affix thereto the work andsuperposed beds or tables on the upper one of which the turret isrotative and which are respectively provided with means for adjustingthem in horizontal planes and in crossing paths. 3 is the dependingshank fixed to said arm. Th arm is adjustable in the frame proper, andthe shank on the arm, lengthwise of the latter, as usual. 4 is therotative spindle arranged under and parallel with the arm and extendingfrom and adapted to be driven as usual by suitable means in the frameproper.

A holder forms with said shank a support and comprises an upper or fixedmember and a lower or rotatively adjustable member, both penetrated bythe spindle and the lower member being adjustable on the upper memberaround the spindle concentric with its axis and imparting to the holdera bifurcated form. The fixed member: This comprises three laminatedplates 5-5:c secured to the outer face of the shank by screws 6, theplates 5 depending below the spindle and having alined circularapertures 5a and the intermediate plate 5r depending short of thespindle so that the upper member is formed bifurcated.

formed as a partial annulus 5c of a diameter greater than the width ofthe adjoining superjacent part of the plate. The rotatively'adjustablemember: This comprises two counterpart plates l spaced the same asplates 5 and having their upper portions formed with alined circularapertures la. Eachsuch upper portion is a circular disk formedconcentrically of its aperture and of the sam diameter as the annuli ofplates 5, such diameter being appreciably greater than the width of theremaining portion-or extension lb of the plate. Said portion existsgrelatively to this extension and an annular flange 1c reaching from saidportion andconcentric with and forming in part the surface of theaperture, as a rabbete'dportion of the plate, whereby an arcuat grooveis developed at id. The plates of the lower member exit interfitted withthe respective plates of the upper member as shown in Fig. 1, or so thattheir apertures la are concentric with apertures 5a and the plates 1have the faces thereof formed with the grooves 1d facing and abuttingthe outer faces of the rabbeted portions of the plates 5, the partialannuli 5c occupying the grooves. Plates 1 are held fixed to but capableof adjustment around the spindle to any angle within 90 in eitherdirection from the depending position by screws 8 tapped into plates 5and penetrating arcuate slots 9 in plates 1.

The spindle is usually journaled in a bushing l0.

in the shank and this in this example is extended into and fits theaperture la of the adjoining plate 1 of the lower holder-member. Anothersuch bushing Illa may be arranged in the aperture .of the other plate 1.

In holes 1c of the extensions lb of the lower member is journaled,parallel. with the spindle, the arbor ll of the cutter [2. The spindleand arbor have respectively fixed thereto the intermeshing gears l3--l4whereby the cutter is driven from the spindle. The cutter is here a diskhaving a plurality of cutters proper lia of any suitable number. Ifthere are more than one they all project to the same radial extent, andconsidering any one it is characterized by its extreme or free end beingdeveloped approximately to a point, as by said end appearing convex inthis example as viewed transversely of the cutters axis.

If the spindle penetrates the support the latter may be bifurcated, asshown, thus to receive the Each of the plates 5, which are counterparts,ls

rabbeted at its lower portion and at its side, as at 512, andconcentrically with the aperture and for a major circumferential extenttherearound it is gearing in the resulting slot and provide substantialsupport for the cutter member, whichis here exterior of the support sothat it may precede the support in the forming of the groove,

If the rotaItive member of the support be adjusted to any angularposition removed from the vertical the cutter will be adapted to developa groove in the work where the latter is so held that the surface to begrooved is displaced angularly from the horizontal.

} Since the support is bifurcated is affords in its slot a housing forthe gearing portion of the movable part of the aforesaid system; and ifit comprises two main members, onefixed and the other rotativ'elyadjustable, interfitti'ng substan'- tially, as described, the'supportwill have a compact form and the latter member will be confined tomovability in only a plane perpendicular to the spindle axis.

It will be understood that the developm nt the groove lengthwise andwith a bend or bends an axis parallel with the spindle, gearingconnecting said spindle and. member, and means to confine said elementrigidly to said structure.

2. A milling machine including a frame proper to and projecting from,the arm. past and penetrate'd by said spindle, an element penetrated bysaid spindle and rotatively adjustable around the same, a cutter memberjo-urnaled in the said elenient on an axis parallel with the spindle,said element and structure together having a slot perpendicular to andpenetrated by the spindle and cutter member, gearing housed in the slotand bed or table rectilineally and horizontally and the turretrotatively; and that groove is attained by adjusting the work'supportingmeans vertically. v g V W is the workand G the groove cuttherein. Havingthus fully describedmy invention,-'w hat a s: i.

'1. A milling machine including a frame proper and an arm projectingfrom and rigid with respect to the frame proper, a rotary spindlejournaled in and projecting from the frame 'proper and having itsaxis-parallel with-the arm, and a groove-cutting system comprisingstructure fixed to and projecting from the arm past and penetrated bysaid axis, an element penetrated by said axis and rotatively adjustablearound thesame, a cutter member journaledin the said elementonconnecting the spindle and said member, and means to confine saidelement rigidly to said structure.

3. A milling machine includinga frame-proper and an ant. projecting andrigid respect to the fraii'ie pro er, a i-o'tar-y. spindle journaled. inahdproj'ectingifrom the frame propelj and having its axispara'llelwithlthe armfiand agroove cutti'n g "system comprising, structure hiredto projecting. from the arm pastand penetrated by said axis, an elementconfined to rotati ve movability in and by said structureconoentricalkyxwith the spindle, a cutter-memberjou-rnaled inthesecondnamed element on an axisparallel with the-spindle, gearingconnecting said;spindleand member, and means to'co-nflne said :elementto said structure against rotation.

